PDF malware analysis — malicious · 42dc3ed97aeabeb8

MALICIOUS

PDF

92.9 KB Created: 2021-09-14 13:55:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 0b051875287866b61eabe9f0e35ce917 SHA-1: fc7013423756ebbda0fbf20284367fae9b061e5c SHA-256: 42dc3ed97aeabeb82d681db68d175b40cd3b9ee42294360f24d2f599501d9e3f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of external URIs and link farms, many pointing to compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous URLs are consistent with a malicious document designed to lure users to external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://nomylo.ru/uplcv?utm_term=pokemon+ultra+shiny+gold+sigma+gba+download PDF link annotation
- https://altonika.pro/files/fck/file/tofowobozeluxomatozaxome.pdfIn PDF document text
- http://anthonyvienna.com/sites/default/files/file/forisojaxini.pdfIn PDF document text
- http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613469656c4d1---jekipivenisosatela.pdfIn PDF document text
- http://autosoftware.company/autoresponders_images/files/5002596600.pdfIn PDF document text
- http://girisimcilikproje.com/resimler/files/29419119952.pdfIn PDF document text
- https://www.milestonesmn.org/ckfinder/userfiles/files/80019869598.pdfIn PDF document text
- https://viktorina.ledoritulys.lt/files/narek.pdfIn PDF document text
- http://lineshare.net/upload/files/20210903202655.pdfIn PDF document text
- http://self119.net/upload/userfiles/2021/09/files/210912015107.pdfIn PDF document text
- https://bikeid.net/ckfinder/userfiles/files/753118534.pdfIn PDF document text
- https://taechoclub.com/FileData/ckfinder/files/20210901_258898A0A05B2F26.pdfIn PDF document text
- https://tselectromechanical.com/uploads/CKfiles/files/46568451807.pdfIn PDF document text
- http://dc-a0dcf319a153.breakthroughsport.com/userfiles/files/zidow.pdfIn PDF document text
- https://cambodiaangkorhomestay.com/userfiles/file/ruvadubezasugikiwo.pdfIn PDF document text
- http://chrisdepanneservices.fr/Sites/cds/files/7926653007.pdfIn PDF document text
- https://amatnieks.lv/pictures/image/6103224170.pdfIn PDF document text
- http://arcdesantmarti.com/biocop/Images/images-editor/file/gegebexakejekes.pdfIn PDF document text
- http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1612f985f7e863---87711259686.pdfIn PDF document text
- https://biocoils.com/img/file/47005752812.pdfIn PDF document text
- https://khonggiansachhanoi.vn/uploads/files/93356715889.pdfIn PDF document text
- https://ph2020.org/FCKeditor/file/8744644373.pdfIn PDF document text
- http://nataliashishkina.com/userfiles/file/31456725528.pdfIn PDF document text
- http://casaledellasignora.it/userfiles/files/vemodofid.pdfIn PDF document text
- http://simsoncantho.com/userfiles/file/xeguwagamexilofedikafit.pdfIn PDF document text
- http://marjoleintje.nl/include/userfiles/neges.pdfIn PDF document text
- http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613aeb95c58da---ziwekevubomuzatiboruxan.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ffb7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFFB7	19004 bytes
SHA-256: `85c421da75d87d1acf1a20edcfc38f774ac6076bde66d55011c8d4a02643a5b0`
`font_01_sfnt_off000131dc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x131DC	11228 bytes
SHA-256: `356c5bd3786164033e5d065e6c3b228809158f4ceac15c5c374a8071b25b9270`
`font_02_sfnt_off00014bdb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14BDB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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